Tube-wrapping lathe



May 7, 1929. w. c. BLEHER ET AL TUBE WRAPPING LATHE Filed May 26, 1927@Sheets-sheet 1 attomwqa' May 7, 1929. w, Q BLEHERVET AL TUBEY WRAPPINGLATHE Filed May 2e, 1927 e sheets-sheet 2 eau/mami m1, www

May 7, 1929. w. c.. BLEHER ET AL 1,711,556

TUBE WRAPPI NG LATHE `Fi1edMay 26, 1927 e sheets-sheet 3 w ci BLEHER ETAL TUBE WRAPPING LATHE May 7, 192.9.

6 Sheets-Sheet 4 Filed May 26, 1927 gwuemoz May 7, 1929. w. c. BLEHER ETAL 1,711,556

TUBE WRAPPING LATHE Filed May 26, 1927 6 Shets-Sheet 5 May 7, 1929.

w. c. BLEHER ET AL 1,711,556

TUBE WRAPPING LATHE Filed May 26, 1927 e sheets-sheet 6 @MMMM PatentedMay 7:, 1929.

UNITED STATES.

gMTENT or-Flci-z.-I

WILLIAM C. BLEHER, `FRANK E. WILLIS, AND ROLAND A. WENTWORTH, Ol' WATER-TOWN, MASSACHUSETTS, ASSIG-NORS TO HOOD vRUBBER COMPANY, l' WATER-TOWN', MASSACHUSETTS, A COBPCRATION 0F MASSACHUSETTS.

TUBE-WRAPPING LATHE.

Application lcd Hay 26,

Our said invention relates to improved V means for holding and rotatingpoles or mandrels carrying uncured rubber tubes forf the purpose ofhaving applied thereto a fabric wrapping, and also to means lncorporatedtherewith for automatically supplying and. removing the mandrels.

The invention aims to provide a simple economical and eici'ent form ofapparatus which will selectively and successively present the mandrelsto wrapping position, rotatethem while in such position, and dischargethe wrapped mandrel, with ammimum of operators attention, and wlthoutdanger of damage. to the uncured tube.

' With thesel and other objects in View, which will be apparent from thefollowing description, the invention includesthe novel features ofconstruction and arrangement and combination of parts hereinafter described, the nature and scopeof the said invention being defined by theclaims appended hereto. n What we at resent consider the preferred2i'embodiment of) the invention is illustrated in the accompanyingdrawings in which Fig, 1 is an end view of the machine or apparatus.Fig.l 2 is a side elevation as viewed from the left, Fig. 1.

Fig. 3 is a view similar to Fig. 1, but on a larger scale and partlybroken away.

Fig. 4 is a detail plan view of the mechanism shown in theupper part ofFig. 3 with partsomitted for clearness of illustration and on a somewhatsmaller scale.

Fig. 5 is a detail view of the mandrel selec- .,tor or separator showingthe manner of mounting and operating the'same. 40 Fig. 6 is a sectionalelevation of the parts shown in Fig. 4 as viewed from above. I' Fig. 7is a detail view of the control disc -and cooperating parts.

Fig. 8 is a detailed plan view of the motor and conveyor beltwith partsbroken away,

and

Fig. 9 is a detail plan view of the control disefof Fig. 7.

- Fig. 10 is a sectional detail view of the 5.0 four-way cock.

N The apparatus herein described is intended to selectively feed themandrels from a gravity supply table or support to which 1927. serialNo. 194,330.

'carries at one end a sprocket 25, driven by chain 26 from a sprocket 27on vthe main shaft 29 of the lathe which is intermittently rotated ashereinafter described.

This shaft 24 carries a pair of separating and feeding members in theshape of discs 28 having mandrel receiving recesses 28a and interveningintact portions or arms. As the mandrels roll down the -inclinedsupports 17 they will encounter the members 28 and be retained therebyuntil in the rotation of the discs, the uncovered ends of the frontmandrel will enter a pair of recesses 28 and be conveyed therewith tothe op osite side of the separators whence they wil be free to roll downthe remaining portions of the supporting rails -17 to the lathe feedingmechanism hereinafter described. As one mandrel is thus being conveyedthe remain- 1ng mandrels back of the members 28 will be retainedor heldback by the next succeeding pair of arms until another pair of recessespicks out the next succeeding mandrel.

After leaving the separator the mandrels roll down the inclined supports-17 to the lathe mechanism to which they are suecessively supplied.

This lathe comprises continuously driven friction wheels 30 forsupporting and rotating the mandrel driven, and presser rolls 31` forholding the mandrel against the friction wheels while being rotated, allas hereinafter described. f 1

In order to feed the mandrels successively from the termini of the rails17 to mandrel rotating position and hold -themrout of contact with thefriction wheels during such feed, we provide the following means: Faston the shaft at each side of the machine and adjacent the frictionwheels 30 which are lll ond we provide guide 33 upon the periph-k eriesof which the uncovered mandrel ends slide or roll, these guides beingheld against rot-ation by the bracket members 33a fast to the frame ofthe machine (see Fig. 4). 0n reaching the position Gr the mandrel endsclear the ends of the guides and can be moved inward into contact withthe liric-l tion drive wheels `under the influence of the presserrollers 31.,

For intermittently moving the shaft 29, discs 32 and presser rollers weprovide the following means. At each end of the shaft 29 is keyeda disc34 which has a plurality of locng dog receiving recessesl 34a and pawlreceiving recesses 34" arranged respectively at 90 apart, and a thirdseries of rel atively deep recesses 34c similarly spaced. A bell cranklever 35 fulcrumed on a fixed pivot 35a has one arm 35b connected by rod36 with an arm 37 fast on rock shaft 38 provided `witha foot pedal ortreadle lever 39. Rod 36 is normally yieldingly held elevated by springmeans such as helical spring lp36 encircling the rod between a collartherevms on and a fixed abutment on the frame, through an opening inwhich the rod passes as shown in Fig. 3. Said rod is preferably formedin two parts connected by a turnbuckle 36b for purposes of adjustment. y

'lhe arm-35c of bell crank 35 carriesy adjacent its free end a lockingdog 35d designed to engage the recesses 34?I andhas also'pivoted theretoa pawl 40, one end of,y which carries a rounded end or roller adapted toride on the periphery of the disc and drop into the ratchet recesses 34bwhile the other end is under the tension of spring 40a.

The free end of the arm l35 is forked as at 35e to straddle slidable rodor bar 41 and engage, when raised, with roller abutment means 41'athereon, the lower end of said rod or bar 41 being adapted to'enter therecesses 34"'. The bar `carries at its upper end a rack 41h engaging agear 42 adapted to cntrol the movement of the presser rollers 3 To thisend each pair of said rollers is l carried by a yoke or head on the endof a piston rod 43'sliding in a stuiiing box in the end of cylinder 44and having a suitable piston`43 therein.

be rotated by gear 42 under the actioinofl rack 41".

Pressure on treadle 39 causes the bell crank 35 to move into theposition s hown4 in Fig. 7 which lifts dog 41 out of its recess and atthe same time causes the roller on the end of pawl 40 to drop into oneof the ratchet recesses 34h. Upward movement of arm 35a causes fork 35eto connect Iwith roller 41a thus lifting rod 41 against the pressure ofspring 41X until its lower end clears the recess in the disc 34 at whichtime the parts are in the position shown lin said Fig. 'l'. Upwardmovement of rod 41 to the position designated through the rack and gearconnection, turns the four way cock to admit pressure duid through pipe46 to the inner end of the cylinder 44'which lraises the rollers 31 outof the path of the mandrel. y

Releasing the treadle 39 allows rodv 33 to rise under the inuence of thespring 36a which rocks the bell crank lever in a clock- Wise directioncausing pawl 40 to impart to disc 34 a quarter rotation. The lower endof rod 41 during each rotation rides on the surface of the discretaining the four way valve in the aforesaid position until the nextsucceeding recess 34c is .reached at which time rod 41 under induence ofspring 41 lenters said recess and locking dog 35d enters thecorresponding recess 34a whereby the disc is locked against movement.

During this quarter' rotation of the discs 34 (described in the singularfor convenience) the mandrel has been carried from position F toposition G at which time it clears the ends of the guides 33.

Theinward movement of rack 41b reverses the four Way valve and admitspressure fluid to the outer end ofthe cylinder through pipe 45 while itsinner end is connected to the atmosphere for exhaust, which causes thepiston to be moved inward and rollers 31 to cont-act with the mandrelends and force them into contact with the rotating friction or drive andsupporting wheels or discs 31 whereby the mandrel is rot-ated. Duringeach rotation the fabric or wrapping strip is fed to the mandrel andwound helically thereon by any suitable means, which as it forms no partof the present invention, is not herein shown and described. lt could infact, if desired, be done by hand.

It will be understood that in the embodiment shown only the right handfriction wheel is driven, the left hand one 30 being an idle wheel ordisc and serving as a rotatable support only. This driving is effectedin the following manner. The shaft of sol motor 48 (Fig. 8) has fastthereon a gear 49 which meshes with a gear 50 (Fig. 2) fast on countershaft 51. This in turn carries a sprocket 52, the chain 53 of whichpasses around a sprocket 54,5 fast on the sleeve or hub of wheel or disc30.

After a tube on a mandrel has been Wrapped the next quarter turn of theconveying members 32 brings the Wrapped tube and mandrel from wrappingposition G to delivery position J Where it is deposited on an endlessconveyor 55 and conveyed to any desired point. While moving fromposition G to delivery point J the mandrels are retained in the recesses32at by curved guides 56. Conveyor 55 passes around a drive pulley atone end fast on shaft 57 (Fig. 8) which is driven by chain and sprocketconnections 58 is heldin trough shape.

from a shaft 59 which in turn is driven by worm gearing 60 from shaft 65connected to the motor shaft through a suitable flexible couplingJ 62.

'lhe upper run of the belt 55 passes over slider supports 63 having acurved upper surface (only one being shown) by which it The lower runpasses. over idle pulleys 64v by which it is held up from the floor, andit may be extended to any suitable point of delivery Where it passesaround an idle pulley (not shown).

While we have described our invention with considerable particularity inorder that the same may be clearly understood'it will be evident thatvarious changes and modifications could. be made without departing fromthe spirit of our invention.

Having thus described our invention what we claim is 1. In apparatus ofthe class described,'a pair` of rotatable mandrel supporting `androtating Wheels, means for driving at least one of said Wheels, meansfor intermittently feeding the mandrels to position their end portionsadjacent the peripheries of said wheels, presser rolls for pressing themandrel ends against said wheel peripheries, and means for ,moving saidpresser rolls towards and from said Wheels.

2. In apparatus of the class described, a pair of rotatable mandrelsupporting and rotating wheels, means for driving at least Y' one ofsaid wheels, a pair of mandrel -positioning discs rotatable about axes.coincident with said Wheels and adjacent thereto, said discs havingspaced apart mandrel end receiving recesses in their peripheries, of adepth suicient to allow themandrel ends to Contact With the wheelperipheries, means for intermittently rotating said discs,means forfeeding mandrels tothe recesses in said Adiscs in one position, curvedguides for holding the mandrel ends out 'of contact with said I' wheelsfor a determined distance, presser 'rolls positioned to press themandrel ends against the wheels' after they leave said guides, and meansfor moving said presser rolls towards and from the said wheels.

3. Apparatus according to claim 2 in` which a mandrel receiving conveyoris positioned below the discs, and curved guides are provided forretaining the mandrels in the recesses until they reach a position oversaid conveyor.

4. Apparatus according to claim 2 in which pawl and ratchet mechanism isprovided for' intermittently rotating the discs,

to each valve and having its end adapted tok successively enter spacedrecesses in the discs, and means whereby said rod is operated in unisonwith said pawl and ratchet mech-r 7. In apparatus of the classdescribed, a pair of rotatablemandrel supporting and rotating wheels,means for driving at least one o f said wheels, a pair of mandrelpositioning'discs rotatable about axes coincident with said wheels, andadjacent thereto, said discs having spaced apart mandrel end receivingrecesses of a depth sufficient to allow the mandrel ends to contact withthe peripheries of said Wheels, means for interm-ittently rotating saiddiscs, means for feeding mandrels into .said recesses when in oneposition, guides for holding the mandrel ends out of contact with thewheel peripheries for a determined distance, presser rolls for pressingsaid mandrels against the wheel peripheries when free from said guides,and fluid pressure means for moving said pressure rolls towards and fromthe said Wheels.

8. In apparatus ofthe class described,v

a pair of rotatable mandrel supporting androtating Wheels, means fordriying at least one of said Wheels, a pair of mandrel positioning discsrotatable about axes coincident with said wheels, and adjacent thereto,said discs-having spaced apart mandrel end receiving recesses of a depthsufficient to alloys]7 the mandrel ends to contact with the peripheriesof said Wheels, means for intermittently rotating said discs, means forfeeding mandrels into said recesses when in one position, guides forholding the mandrelv ends out of contact with the Wheel peripheries Yfora determined distance, 'presser rolls for pressing said mandrels againstthe wheel peripheries when free from said guides, and fluid pressuremeans for moving said press- 4er rolls towards and from the mandrels,

and means whereby said fluid pressure means is automatically controlledin unison l0; In apparatus of the class described, a'

pair of rotatable mandrel supporting and rotating wheels, means fordriving at least one of said wheels, a pair of mandrel positioning discsrotatable about axes co1nc1dent v with said wheels, and having mandrelend receiving recesses of a depth sufficient to allow contact of themandrel ends with said wheels, guides for holding the mandrel ends outof contact with the wheels for a determined distance, presser rolls foracting on the mandrel ends adjacent the termini of the guides, means forintermittently rotating the discs, and means for moving the presserrolls towards and from the wheels.

11. In apparatus of the class described, va pair of rotatable mandrelsupporting and rotating wheels, ymeans for driving at least one of saidwheels, a pair of mandrel positioning discs rotatable about axescoincident with said wheels, and having mandrel end receiving recessesof a depth suilicient to allow contact of the mandrel ends with saidwheels, guides for holding the mandrel ends out of contact with thewheels'f for a determined distance, presser rolls for acting on themandrel ends adj acent the termini of the guides, pawl and ratchetmechanism for intermittently rotating said discs, means controlled bysaid pawl and ratchet mechanism for moving said presser rolls towardsand from the drive wheels, and means for preventing movement of therollsy towards the drive wheels until the discs have been moved to apredetermined position.

l2. In apparatus of the class described, a pair of rotatable mandrelsupporting and rotating wheels, means for driving at least one of saidwheels, a pair of mandrel positioning discs rotatable about axescoincident with said wheels, and having mandrel end receiving recessesof a depth sufficient to allow Contact of the mandrel ends with, saidwheels, guides for holding the mandrel ends out of contact with thewheelsfor a determined distance, presser rolls for acting on the mandrelends adjacent the termini of the guides, cylindrical ratchet membersoperatively connected with said discs having -ratchet abutments, pawlmeans for engaging said abutments to intermittently rotate said membersand discs, presser rolls mounted to move towards and from the drivewheels, Huid pressure means for moving said rolls towards and from thedrive wheels, valve means for controlling said fluid pressure means,reciprocating rods operatively connected to said guide means andnormally pressed towards said cylindric ratchet members, and meanswhereby operation of said pawl means to rotate said ratchet membersmoves ,saidl rods'away from members, said rods having ends adapted toride on the cylindric surface of said vratchet members and said membershaving recesses to permit entrance of the rods to reverse the valvemeansbers connected with said discs and having ratchet abutments,rocking levers having pawls cooperating with said abutments, presserrolls' mounted to move towards and from the Wheels, double acting fluidpressure-means for operating said presser rolls,

valve means for controlling said fluid presser lmeans, rods operativelyconnected with said valve means and normally spring pressed towards saidratchet members, said ratchet members having cylindric surfaces on whichthe endsv of said rods can ride and having rod end receiving recesses,said rocking levers having parts coacting with abutments on the rods tomove them away from said ratchet members.

14. In apparatus of the class described, a pair of mandrel rotatingwheels,'mcans for driving at least one of said wheels, a pair of mandrelpositioning discs rotatable about axes coincident with said wheels andhaving mandrel receiving recesses of a depth Sullicient to allow contactof the mandrels with said wheels, guides for holding the mandrels,

from contact with the wheels for a determined distance,means forintermittently rotating said'vdiscs including cylindric membersconnected with said discs and having ratchet abutments, rocking levershaving pawls cooperating with said abutments, presser rolls mounted tomove towards and from the wheels, double acting tluid pressure means foroperating said presser rolls, valve means for controlling said fluidpresser means, rods operatively connected with said valve means andnormally spring pressed towards said ratchet members, said ratchetlmembers having eylindrie surfaces on which the ends of said rods canride and having rod end receiving recesses, said rocking levers havingparts coacting With labutments on the rods to move them away from saidratchet members, said rocking levers having locking dogs and saidratchet member recesses to receive said dogs.

15. In apparatus of the class described, a pair otl mandrel rotatingwheels, means for driving at least one of said Wheels. a pair or'mandrel positioning discs rotatable about axes coincident with the axisif-said Wheels, and having spaced apart mandrel receiving' recesses intheir peripheries of a depth sufficient to permit the mandi-els tocontact with the discs,- guides'for holdingr the mandrels from Contactwith the discs foi' y a determined distance, means for intermittentlyrotating said discs, mclmed gulde means for supportingr 'mandrels andfeeding them by gravity to the recesses in said disks, and separatormeans carried by said guides and adapted to hold back the mandrels onsaid guildes and release them o ne at a time, and means for operatingsaid separator means.

16. In apparatus of the class described a pair of rotatable mandrelsupporting and rotating wheels, means for driving at least one of saidWheels, means for feeding tube.. bearing mandrels to position theiruncovered ends adjacent the peripheries of said Wheels, and means forpressing said mandrel ends into frictional contact With the peripheriesof said Wheels.

In testimony whereof, We affix our signatures.

WILLIAM C. BLEHER. FRANK E. IVILLIS. ROLAND A. IVENTWORTH.

